syzkaller login: [ 32.177891] BUG: Bad rss-counter state mm:00000000e324776c type:MM_FILEPAGES val:33 [ 32.179095] BUG: Bad rss-counter state mm:00000000e324776c type:MM_ANONPAGES val:22 [ 32.300467] ================================================================== [ 32.301454] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.302458] Read of size 8 at addr ffff88800fc823f8 by task sshd/220 [ 32.303274] [ 32.303629] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.304539] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.305594] Call Trace: [ 32.305941] [ 32.306240] dump_stack_lvl+0x91/0xf0 [ 32.306753] print_report+0xcc/0x620 [ 32.307260] ? __virt_addr_valid+0x102/0x340 [ 32.307856] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.308500] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.309153] kasan_report+0xbe/0xf0 [ 32.309664] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.310314] vma_interval_tree_remove+0xc75/0xec0 [ 32.310960] vma_prepare+0xc54/0x11a0 [ 32.311448] __split_vma+0x5af/0x950 [ 32.311948] ? __pfx___split_vma+0x10/0x10 [ 32.312492] ? find_held_lock+0x2c/0x110 [ 32.313022] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.313617] ? lock_is_held_type+0x9f/0x120 [ 32.314168] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.314790] ? mtree_range_walk+0x632/0x900 [ 32.315353] ? mas_walk+0x5c7/0x7c0 [ 32.315848] do_vmi_munmap+0x1f1/0x2b0 [ 32.316353] mmap_region+0x1f9/0x2660 [ 32.316851] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.317388] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.318132] ? __pfx_lock_acquire+0x10/0x10 [ 32.318678] ? __pfx_mmap_region+0x10/0x10 [ 32.319216] ? security_mmap_addr+0x7d/0xa0 [ 32.319772] ? get_unmapped_area+0x1f5/0x3f0 [ 32.320330] do_mmap+0x854/0xf00 [ 32.320791] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.321298] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.321892] ksys_mmap_pgoff+0x3af/0x500 [ 32.322415] do_syscall_64+0x3f/0x90 [ 32.322903] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.323568] RIP: 0033:0x7ff3b3251d82 [ 32.324041] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 32.326211] RSP: 002b:00007fff07a4f258 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.327145] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff3b3251d82 [ 32.328015] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff3b268b000 [ 32.328894] RBP: 00007ff3b268b000 R08: 0000000000000009 R09: 0000000000001000 [ 32.329783] R10: 0000000000000812 R11: 0000000000000206 R12: 000056370c0eaec0 [ 32.330661] R13: 00007fff07a4f270 R14: 00007fff07a4f2a0 R15: 00007fff07a4f600 [ 32.331548] [ 32.331856] [ 32.332079] Allocated by task 213: [ 32.332526] kasan_save_stack+0x22/0x50 [ 32.333055] kasan_set_track+0x25/0x30 [ 32.333588] __kasan_slab_alloc+0x59/0x70 [ 32.334133] kmem_cache_alloc+0x16b/0x370 [ 32.334663] vm_area_dup+0x20/0x160 [ 32.335137] __split_vma+0x170/0x950 [ 32.335620] split_vma+0xc6/0x110 [ 32.336065] mprotect_fixup+0x8d2/0xb30 [ 32.336573] do_mprotect_pkey+0x87e/0xd40 [ 32.337094] __x64_sys_mprotect+0x78/0xc0 [ 32.337647] do_syscall_64+0x3f/0x90 [ 32.338134] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.338786] [ 32.339007] Freed by task 213: [ 32.339405] kasan_save_stack+0x22/0x50 [ 32.339917] kasan_set_track+0x25/0x30 [ 32.340416] kasan_save_free_info+0x2b/0x50 [ 32.340958] __kasan_slab_free+0x10a/0x190 [ 32.341510] kmem_cache_free+0x10d/0x4d0 [ 32.342046] rcu_core+0x8c8/0x2860 [ 32.342506] __do_softirq+0x1b7/0x7d4 [ 32.342987] [ 32.343203] Last potentially related work creation: [ 32.343791] kasan_save_stack+0x22/0x50 [ 32.344415] __kasan_record_aux_stack+0x8e/0xa0 [ 32.344992] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.345653] remove_vma+0x139/0x170 [ 32.346113] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.346667] do_vmi_munmap+0x1f1/0x2b0 [ 32.347163] __vm_munmap+0x138/0x3a0 [ 32.347633] __x64_sys_munmap+0x59/0x80 [ 32.348126] do_syscall_64+0x3f/0x90 [ 32.348611] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.349264] [ 32.349477] The buggy address belongs to the object at ffff88800fc823a0 [ 32.349477] which belongs to the cache vm_area_struct of size 168 [ 32.350956] The buggy address is located 88 bytes inside of [ 32.350956] freed 168-byte region [ffff88800fc823a0, ffff88800fc82448) [ 32.352362] [ 32.352577] The buggy address belongs to the physical page: [ 32.353235] page:0000000067ae9219 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc82 [ 32.354347] memcg:ffff88801a017501 [ 32.354783] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.355426] page_type: 0xffffffff() [ 32.355876] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.356800] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a017501 [ 32.357737] page dumped because: kasan: bad access detected [ 32.358410] [ 32.358621] Memory state around the buggy address: [ 32.359199] ffff88800fc82280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 32.360050] ffff88800fc82300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 32.360911] >ffff88800fc82380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.361775] ^ [ 32.362620] ffff88800fc82400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.363471] ffff88800fc82480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.364323] ================================================================== [ 32.365386] Disabling lock debugging due to kernel taint [ 34.850881] BUG: Bad rss-counter state mm:00000000ad3aaaf5 type:MM_FILEPAGES val:33 [ 34.851873] BUG: Bad rss-counter state mm:00000000ad3aaaf5 type:MM_ANONPAGES val:22 [ 35.328030] BUG: Bad rss-counter state mm:00000000a00a47dc type:MM_FILEPAGES val:33 [ 35.328970] BUG: Bad rss-counter state mm:00000000a00a47dc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16975' (ECDSA) to the list of known hosts. 2023/06/20 04:41:04 fuzzer started 2023/06/20 04:41:05 dialing manager at localhost:44161 2023/06/20 04:41:05 checking machine... 2023/06/20 04:41:05 checking revisions... [ 36.015614] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:41:05 testing simple program... [ 36.058137] cgroup: Unknown subsys name 'net' [ 36.096401] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:41:03 Registers: info registers vcpu 0 RAX=1ffffffff0baf27b RBX=ffffffff85d793dc RCX=ffffffff810001cd RDX=0000000000000000 RSI=ffffffff860723cc RDI=ffffffff85d793d4 RBP=ffffffff85d793d4 RSP=ffff88806ce099e0 R8 =ffffffff860723cc R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000000000 R12=ffffffff85d793e8 R13=ffffffff85d793d4 R14=ffffffff85d793d4 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffe46c7a678 CR3=0000000005482000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=00007f23a3458510000055e4e7521790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff11003030ed8 RCX=1ffff11003030ec5 RDX=dffffc0000000000 RSI=ffffffff814821f8 RDI=ffffffff854ee9ec RBP=ffffffff854ee9e0 RSP=ffff8880181876c0 R8 =0000000000000004 R9 =0000000000000000 R10=00000000fffffffe R11=00000000000b6996 R12=dffffc0000000000 R13=ffffffff854ee9e0 R14=ffff88801928d978 R15=ffff8880181878d0 RIP=ffffffff8148241b RFL=00000286 [--S--P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc101c39700 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f17ab048020 CR3=00000000094ac000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2034303a31343a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a31343a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000